Convert Dolby Vision Profile 7 To Profile 8 New Portable

The Core Concept

• Profile 7 (P7): Used on 4K Blu-rays. Has a 10-bit HDR10 base layer + a 2nd “enhancement” layer (EL, often 1080p, 10‑ or 12‑bit). This EL is required for full Dolby Vision reconstruction.
• Profile 8 (P8.1): A single‑layer, 10‑bit or 12‑bit stream (no separate EL). Widely supported by streaming services, many TVs (LG, Sony, Hisense), media players (Shield TV, Ugoos AM6B+), and software players (Infuse, Plex, VLC). P8.1 carries full dynamic metadata, but discards the enhancement layer’s spatial info.
• Profile 8.4: Used for Blu‑ray backups with the EL merged into a single 12‑bit stream (P8.4 is not officially standard but is emerging via tools like dovi_tool). Best quality for playback on capable devices.

Issue 3: Lip-sync issues after muxing.

Because it holds two layers, Profile 7 files are massive and require a player capable of decoding two streams simultaneously and merging them in real-time. Hardware support for this is rare outside of dedicated players. convert dolby vision profile 7 to profile 8 new

--discard removes the enhancement layer, which isn't used in Profile 8. The Core Concept